Revert r95841 due to failing media_unittests on linux_shared bot.

media/video/picture.h

Index: media/video/picture.h
===================================================================
--- media/video/picture.h	(revision 95843)
+++ media/video/picture.h	(working copy)
@@ -6,7 +6,6 @@
 #define MEDIA_VIDEO_PICTURE_H_
 
 #include "base/basictypes.h"
-#include "media/base/media_export.h"
 #include "ui/gfx/gl/gl_context.h"
 #include "ui/gfx/size.h"
 
@@ -14,7 +13,7 @@
 
 // A picture buffer that is composed of a GLES2 texture.
 // This is the media-namespace equivalent of PP_PictureBuffer_Dev.
-class MEDIA_EXPORT PictureBuffer {
+class PictureBuffer {
  public:
   PictureBuffer(int32 id, gfx::Size size, uint32 texture_id);
 
@@ -43,7 +42,7 @@
 
 // A decoded picture frame.
 // This is the media-namespace equivalent of PP_Picture_Dev.
-class MEDIA_EXPORT Picture {
+class Picture {
  public:
   Picture(int32 picture_buffer_id, int32 bitstream_buffer_id);